subsys/system/explorer/Seashell/SeaShellExt/uidragdropctrl.cpp

   1 //*******************************************************************************
   2 // COPYRIGHT NOTES
   3 // ---------------
   4 // You may use this source code, compile or redistribute it as part of your application
   5 // for free. You cannot redistribute it as a part of a software development
   6 // library without the agreement of the author. If the sources are
   7 // distributed along with the application, you should leave the original
   8 // copyright notes in the source code without any changes.
   9 // This code can be used WITHOUT ANY WARRANTIES at your own risk.
  10 //
  11 // For the latest updates to this code, check this site:
  12 // http://www.masmex.com
  13 // after Sept 2000
  14 //
  15 // Copyright(C) 2000 Philip Oldaker <email: philip@masmex.com>
  16 //*******************************************************************************
  17
  18 #include "stdafx.h"
  19 #include "UICtrl.h"
  20 #include "UIDragDropCtrl.h"
  21
  22 #ifdef _DEBUG
  23 #define new DEBUG_NEW
  24 #undef THIS_FILE
  25 static char THIS_FILE[] = __FILE__;
  26 #endif
  27
  28 /////////////////////////////////////////////////////////////////////////////
  29 // CDragDropCtrl
  30
  31 CDragDropCtrl::CDragDropCtrl()
  32 {
  33         m_dwKeyboardState = 0;
  34 }
  35
  36 CDragDropCtrl::~CDragDropCtrl()
  37 {
  38 }
  39
  40 void CDragDropCtrl::OnDragLeave(CWnd* pWnd)
  41 {
  42         CDD_OleDropTargetInfo Info(pWnd->GetSafeHwnd());
  43         // was message handled?
  44         if (pWnd->SendMessage(WM_APP_OLE_DD_LEAVE,(WPARAM)&Info) == FALSE)
  45                 pWnd->GetParent()->SendMessage(WM_APP_OLE_DD_LEAVE,(WPARAM)&Info);
  46         COleDropTarget::OnDragLeave(pWnd);
  47 }
  48
  49 DROPEFFECT CDragDropCtrl::OnDragEnter( CWnd* pWnd, COleDataObject* pDataObject, DWORD dwKeyState, CPoint point )
  50 {
  51         CDD_OleDropTargetInfo Info(pWnd->GetSafeHwnd(),point,pDataObject);
  52         m_dwEnterKeyboardState = dwKeyState;
  53         Info.SetKeyboardState(dwKeyState);
  54         // was message handled?
  55         BOOL bRet = pWnd->SendMessage(WM_APP_OLE_DD_ENTER,(WPARAM)&Info);
  56         if (bRet == FALSE)
  57                 bRet = pWnd->GetParent()->SendMessage(WM_APP_OLE_DD_ENTER,(WPARAM)&Info);
  58         return Info.GetDropEffect();
  59 }
  60
  61 DROPEFFECT CDragDropCtrl::OnDragOver( CWnd* pWnd, COleDataObject* pDataObject, DWORD dwKeyState, CPoint point )
  62 {
  63         CDD_OleDropTargetInfo Info(pWnd->GetSafeHwnd(),point,pDataObject);
  64         Info.SetKeyboardState(dwKeyState);
  65         // was message handled?
  66         m_dwKeyboardState = dwKeyState;
  67         BOOL bRet = pWnd->SendMessage(WM_APP_OLE_DD_OVER,(WPARAM)&Info);
  68         if (bRet == FALSE)
  69                 bRet = pWnd->GetParent()->SendMessage(WM_APP_OLE_DD_OVER,(WPARAM)&Info);
  70         if (bRet == FALSE)
  71                 return DROPEFFECT_NONE;
  72         return Info.GetDropEffect();
  73 }
  74
  75 BOOL CDragDropCtrl::OnDrop( CWnd* pWnd, COleDataObject* pDataObject, DROPEFFECT dropEffect, CPoint point )
  76 {
  77         CDD_OleDropTargetInfo Info(pWnd->GetSafeHwnd(),point,pDataObject);
  78         Info.SetDropEffect(dropEffect);
  79         if (m_dwEnterKeyboardState & MK_RBUTTON)
  80                 m_dwKeyboardState |= MK_RBUTTON;
  81         if (m_dwEnterKeyboardState & MK_LBUTTON)
  82                 m_dwKeyboardState |= MK_LBUTTON;
  83         Info.SetKeyboardState(m_dwKeyboardState);
  84         BOOL bRet = pWnd->SendMessage(WM_APP_OLE_DD_DROP,(WPARAM)&Info);
  85         // try parent if no reply
  86         if (bRet == FALSE)
  87                 bRet = pWnd->GetParent()->SendMessage(WM_APP_OLE_DD_DROP,(WPARAM)&Info);
  88         return bRet;
  89 }
  90